When the analysis of population density is done by calculating it through net cultivated area, then the measure is termed as:

The correct option is Physiological density.

Population density measures are crucial tools in geography and demographics to understand the relationship between humans and the land they occupy. Depending on the specific type of land area used in the calculation, different density measures are defined:

1. Physiological Density:
Physiological density (also known as real density) is calculated by dividing the total population of a region by its net cultivated (or arable) land area. This measure is highly useful because it shows the real pressure of the population on the agricultural land that is actually capable of producing food.

$\text{Physiological Density}=\frac{\text{Total Population}}{\text{Net Cultivated Area}}$

2. Agricultural Density:
Agricultural density, on the other hand, only considers the agricultural population (farmers and their households) in relation to the net cultivated area.

$\text{Agricultural Density}=\frac{\text{Agricultural Population}}{\text{Net Cultivated Area}}$

3. Arithmetic Density:
This is the simple ratio of the total population to the total land area, without distinguishing between productive cultivated land and uninhabitable/unusable land (like deserts or mountains).

Since the question specifically refers to the calculation of population density using the net cultivated area as the base, the correct term is Physiological density.